This is nothing new,the same thing happened several times on Chrome App Store and according to what can be read on some sites does not pose any danger-it only redirect to Ledger site for now.
3 months ago
Ledger comment that :
Hello,
I'm Fred, VP of Engineering @ledger.
This app is neither provided nor endorsed by Ledger.
We've audited the code and it doesn't do anything malicious yet, but asks for the largest possible set of permissions. This means a future update might contain malicious code.
We've reported the application to Google, in the meantime, it MUST NOT be installed.
Only correct way is to download everything from official site,otherwise you expose yourself to unnecessary risk.In the near future Chrome will stop to support apps and Ledger will release desktop app,problem with fake apps will be solved.